Natura - nature
   actualia - actual entities
     Mundus Plinius - physical world
       naturalia - natural bodies
         [crown] Clade Biota Wagner 2004 [Wiemann, de Queiroz, Rowe, Planavsky, Anderson, Gogarten, Turner & Gauthier 2020]
           Domain Bacteria Woese et al. 1990 [paraphyletic?]
             Superphylum "Proteobacteria" Craig et al. 2010
               Phylum "Alphaproteobacteria" Garrity et al., 2006 [monotypic]
                 Class Alphaproteobacteriaᵀ Garrity et al. 2006
                   Order Sphingomonadales Yabuuchi and Kosako 2006
                     Family Sphingomonadaceaeᵀ Kosako et al. 2000
                       Genus Sphingoaurantiacus Kim et al. 2016
                       Genus Sphingomicrobium Kämpfer et al. 2012
                       Genus Sphingorhabdus Jogler et al. 2013
                       Genus Stakelama Chen et al. 2010
                       01 Genus Sphingomonasᵀ Yabuuchi et al. 1990
                       02 Genus Blastomonas Sly and Cahill 1997
                       03 Genus Hephaestia Felfoldi et al. 2014 [monotypic]
                       04.1 Genus Novosphingobium Takeuchi et al. 2001
                       04.2 Genus Parablastomonas Ren et al. 2015 [monotypic]
                       05 Genus Parasphingopyxis Uchida et al. 2012 [monotypic]
                       06 Genus Polymorphobacter Fukuda et al. 2014 [monotypic]
                       07 Genus Sandaracinobacter Yurkov et al. 1997 [monotypic]
                       08 Genus Sandarakinorhabdus Gich and Overmann 2006 [monotypic]
                       09 Genus Sphingobium Takeuchi et al. 2001
                       10 Genus Sphingopyxis Takeuchi et al. 2001
                       11 Genus Sphingosinicella Maruyama et al. 2006
                       12 Genus Zymomonas Kluyver and van Niel 1936 (Approved Lists 1980) [monotypic]